61101666542 has 16 divisors (see below), whose sum is σ = 105510284640. Its totient is φ = 25995285888.

The previous prime is 61101666529. The next prime is 61101666547. The reversal of 61101666542 is 24566610116.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61101666496 and 61101666505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61101666547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15926567 + ... + 15930402.

It is an arithmetic number, because the mean of its divisors is an integer number (6594392790).

Almost surely, 2^61101666542 is an apocalyptic number.

61101666542 is a deficient number, since it is larger than the sum of its proper divisors (44408618098).

61101666542 is a wasteful number, since it uses less digits than its factorization.

61101666542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31857115.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 61101666542 in words is "sixty-one billion, one hundred one million, six hundred sixty-six thousand, five hundred forty-two".